The Black Diamond ATC Pilot is the newest belay device from Black Diamond. The rope is installed the same way as a standard ATC however with the ATC Pilot there is assisted braking. The large hook on the device is used to 'unlock' the rope when paying out slack quickly. Lower the climber smoothly by tilting the device. The ATC Pilot makes belaying less tiring for the belayer when working on a route. See the video below for a tutorial and check out our review here!